Calendar watch movement



- July 30, 1940- H. AEBERHARDT CALENDAR WATCH MQVEMENT Filed Dec. 16, 1936 4 Sheets-Sheet l July 30, 1940. H: AEBERHARDT 2,209,642

CALENDAR WATCH MOVEMENT Filed Dec. 16, 1956 4 Sheets-Sheet 2 INVENTOR 8 HANS AEBER HARDT CWMZYW TT Y5.

July 30, 1940- H. AEBERHARDT CALENDAR WATCH MOVEMENT Filed Dec. 16, 1936 4 Sheets-Sheet 5 INVENTOR RHARDT HANS AEBE Bv W wJ-MW ATTYS July 30, 1940.

H. AEBERHARDT CALENDAR WATCH MOVEMENT Filed Dec. 16, 1936 4 Sheets-$heet 4 HANS AEBERHARDT Patented July 30, 1940 UNITED STATES PATENT OFFICE Application December 16, 1936, Serial No. 116,205 In Switzerland December 17, 1935 4 Claims.

The present invention relates to a calendar watch movement.

The watches of this kind, known heretofore, have a mechanism by which the calendar index indicates the date by jumping one step every 24 hours. To effect this a spring is required which by reason of a poor hardening of the steel or of fatigue on account of insufficient hardening makes frequent repairs necessary.

The movement according to the present invention avoids such deficiencies. The mechanism is constituted only of gear wheels and pinions and the index wheel has a continuous rotating movement and may be arranged either centrally, that is, on the center pivot staff, or eccentrically on a pivot which may be provided for instance on the head of the fastening screw of the cock of the time setting mechanism.

A particular advantage of the watch movement arrangements according to the present in- Vention besides those already mentioned is the fact that watchmakers who are manufacturing difierent patterns of calendar watches, as for instance such with a calendar dial arranged concentrically to the ordinary time dial and such with separate calendar dials, need to keep in stock only a single standard. pattern of spare plates, instead of providing as many stocks of plates as there are different patterns to be made. This saves much money especially also owing to the fact that only a single controlling and verifying punch Which is very expensive is required.

In the annexed drawings several embodiments of the invention are represented schematically.

Figures 1 and 2 are two plan views showing that the calendar wheel may be arranged centrally as in Fig. 2 or eccentrically on a pivot arranged coaxially with the wheel of the time setting mechanism;

Fig. 1a is a sectional view on a line Ia-Ia of Fig. 1;

Fig. 2a is a sectional view on the line IIa-IIa of Fig. 2;

Figs. 3 and 4 are two plan views showing arrangements where the calendar wheel may be mounted either centrally or eccentrically on an optional radial line;

Fig. 3a is a sectional view on line IIIa--IIIa of Fig, 3;

Fig. 4a is a sectional view on line Iva-Iva of Fig. 4;

Fig. 5 is a sectional view similar to that of Fig. 3a but having the calendar wheel arranged below instead of above the intermediate wheel,

whereby the watch may be reduced somewhat in thickness;

Fig. 6 is a sectional view similar to that of Fig. 2a but having the calendar wheel arranged above the dial; 5

Figs. 7, 8 and 9 show arrangements similar to those of Figs. 1 and 2 permitting the placing of the calendar wheel centrally or eccentrically but so that the diameter of the watch may be reduced as for wrist watches;

Fig. 8 is a sectional view on a diameter including the pivot of the second hand; and

Figs. 10 and 11 are views of dials, Fig. 10 of the arrangements in Figs. 1 and 9and Fig. 11 of the arrangements in Figs. 2, 4 and 7.

The gear wheels used in most all these embodiments of the invention consist of a gear wheel having a pinion formed at its hub.

According to Figs. 1 and 1a where the latter is a section on the line IaIa of Fig. 1, the pinion 2 integral with the minute cannon 3 mounted on the center stall l meshes with an intermediate wheel 5 pivoted on 4. The pinion 6 of wheel 5 meshes on one side with hour wheel 8, integral with the hour wheel sleeve 1, and on the other side with an intermediate wheel l0 pivoted on pivot pin 9 and meshing with its pinion H with an intermediate wheel 13 pivoted on pivot 12. The pinion I4 of this wheel operates the calendar wheel 15, which is pivoted on a pin l'l arranged coaxially with the pivot of an intermediate wheel l6 of the time setting mechanism, which is located in a notch 18 of the plate and meshes by a second intermediate wheel 19 with the intermediate wheel 5 pivoted on pin 4.

Instead of the eccentric arrangement, as just described, the calendar wheel l5 could also be mounted by a centric arrangement on the hour wheel sleeve 1 as shown in Figs. 2, 2a., where the latter is a section on the line 1Ia-1Ia in Fig. 2. 40 Pinion 14 of the intermediate wheel I3 is in this case located at the same distance from pivot I as from pivot I! which is fast to and projecting from the center of the screw head I1 The calendar wheel could also be located as shown in Figs. 3, 3a, where the latter is a section on the line IIIaIIIa in Fig. 3.

In this arrangement the hour wheel sleeve 1 carries besides the hour wheel 8 a pinion 2B which meshes with an intermediate wheel 22 pivoted on pin 2|. The pinion 23 of this wheel 22 meshes according to Fig. 3 with the calendar wheel IS" on pivot pin 24. Now since the distances between pivot I and pivot 2| and between 2| and 24 have been chosen the same the calendar 55 wheel could also be mounted concentrically to the center pivot pin 5. The advantage of these arrangements represented in Figs. 3, 3a,, 4, 4a is that only one intermediate wheel 22 is needed. In Figures 4 and 4a the calendar wheel I5 projects with its sleeve to the outside of the dial where it carries a hand 35 as shown in Fig. 11.

In Fig, 6, there is also represented on the lefthand side a changed arrangement of intermediate wheel l3, and in Fig. 5, which is a modified arrangement of Fig, 341', on the right-hand side a changed arrangement of the intermediate wheel 22. In the first of these arrangements (Fig. 6), the intermediate wheel 13' pierces with its pinion the dial to mesh with the calendar wheel, and in the second arrangement (Fig. 5), the intermediate wheel 22 is placed above, instead of beneath, the corresponding calendar wheel to permit reducing of the thickness of the watch. I

In the embodiment according to Figs. '7, 8 and 9, where Fig. 8 is a section of Fig. 7, the pinion 2 of the minute cannon 3 supported by the center pivot l meshes with an intermediate wheel 5 pivoted on pin 4 and the pinion 6 of this wheel meshes on one side with the hour wheel 8 and on the other side with a wheel 26 pivoted on pin 25. The pinion 24 of this latter wheel engages the wheel 29 pivoted on pin 28 and the pinion 2! of this wheel engages the centrally arranged calendar wheel 30 but could also as shown in Fig. 9 operate an eccentrically arranged calendar wheel 30 which is pivoted on an extension 32 of a fastening screw I'I of the cock 33 of the time setting mechanism. This is made possible by the fact that the distances between pivot 28 and the pivots I and 32 have been chosen the same. Pivot I carries the calendar wheel 3! inside of the dial 35,, which wheel projects with its hub to the outside of the dial and carries there the index 35. The time setting mechanism is located within a notch 36 of the plate 31. The hour-hand is marked with 38, the minute-hand with 39 and the second-hand with 40.

The increased space required by the calendar mechanism is easily obtained by sinkings in'the plate.

From Fig. hi it is seen, that plate 31 has sinkings for the single parts of the calendar mechanism while according to Fig. 8 there is one whole sinking which leaves only a narrow rim 4! surrounding the mechanism.

Fig. shows a front view of a watch with an excentrically arranged calendar wheel and Fig. 11 a front view of a watch with a concentric arrangement of a calendar wheel.

What I claim as new is:

1. In a calendar watch movement and in combination, a center stafi, an hour wheel sleeve, a pinion provided thereon, an auxiliary pivot,

a calendar wheel mounted thereon, one intermediate gear consisting of a spur wheel and a pinion adapted to transmit the movement from the hour wheel sleeve to the calendar wheel, the distance between the center stafi and the pivot of the intermdiate gear and between this pivot and the auxiliary pivot being the same.

2. In a calendar watch movement and in combination, a gear wheel mechanism comprising a center staff, an hour wheel sleeve and an hour wheel, two optional pivots capable of receiving a calendar wheel, one of said pivots being concentric With the center staff and the other pivot being auxiliary and eccentric thereto, a calendar wheel with index on one of said pivots, and an additional gear wheel mechanism to transmit movement from the hour wheel sleeve to said calendar wheel.

3. In a calendar watch movement and in combination, a gear wheel mechanism comprising a center staff, an hour wheel sleeve and an hour wheel, a time setting mechanism, a screw head on said time setting mechanism formed as an auxiliary pivot of the movement and adapted to receive a calendar wheel, a calendar wheel mounted on said hour wheel sleeve, an intermediate pivot having a gear mounted thereon and consisting of a spur wheel and a pinion, said pinion meshing with the calendar wheel, said pivot pin being located at the same distance from said auxiliary pivot and from the center staff, and two intermeshing intermediate gears consisting each of a spur wheel and a pinion and adapted to transmit movement from the hour wheel sleeve to said intermediate pinion.

4. In a calendar watch movement and in combination, a gear wheel mechanism comprising a center staff, an hour wheel sleeve and an hour wheel, a calendar wheel mounted on the hour wheel sleeve, a time setting gear comprising a cock and a fastening screw, an extension formed on said screw to constitute an auxiliary pivot adapted to receive at option said calendar Wheel, a wheel held by said cock coaxially with said auxiliary pivot, an intermediate gear consisting of a spur wheel and a pinion, the spur wheel meshing with the wheel held by said cock and the pinion with the hour wheel, an intermediate pivot equally distant from the center stafi and said auxiliary pivot, and two other intermeshing intermediate gears each consisting of a spur wheel and a pinion, the'first of said other intermediate gears being mounted on said intermediate pivot and having its pinion in mesh with the calendar wheel, and the spur wheel of the second of said other intermediate gears being in mesh with said pinion of the first mentioned intermediate gear in mesh with the hour wheel.

HANS AEBERHARDT. 

